During the era of dual federalism, what was the primary goal of the federal government's domestic policies? to promote competition between the states to promote the development of commercial activity between and among the states to protect citizens from the abuses of state governments to keep the states from going to war with each other

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.